1 files changed, 1 insertions, 1 deletions
diff --git a/js/runtime.ts b/js/runtime.ts
index a0fd6d622..1a9e8497d 100644
--- a/js/runtime.ts
+++ b/js/runtime.ts
@@ -313,7 +313,7 @@ class TypeScriptHost implements ts.LanguageServiceHost {
 
   readFile(path: string, encoding?: string): string | undefined {
     util.log("readFile", path);
-    throw Error("not implemented");
+    return util.notImplemented();
   }
 
   getNewLine() {